BatchWriteItemCommand with AWS.DynamoDB class using AWS SDK V3 in Nodejs - amazon-web-services

Question

I have been trying for hours to perform a DynamoDB DeleteRequest using BatchWriteItemCommand but I keep getting the following error:
Error ValidationException: 1 validation error detected: Value null at 'requestItems.td_notes_sdk.member.1.member.deleteRequest.key' failed to satisfy constraint: Member must not be null
This is what my table looks like:
Partition key: user_id (string)
Sort key: timestamp (number)
DynamoDB Screenshot
This is what my code looks like:
// Import required AWS SDK clients and commands for Node.js
import {
DynamoDBClient,
BatchWriteItemCommand,
} from "#aws-sdk/client-dynamodb";
// Set the parameters
export const params = {
RequestItems: {
"td_notes_sdk": [
{
DeleteRequest: {
Item: {
Key: {
user_id: { S : "bb" },
timestamp: { N : 2 },
},
},
},
},
],
},
};
export const run = async () => {
const ddbClient = new DynamoDBClient({ region: "us-east-2" });
try {
const data = await ddbClient.send(new BatchWriteItemCommand(params));
console.log("Success, items inserted", data);
return data;
} catch (err) {
console.log("Error", err);
}
};
run();
Here are some resources that I've been trying to follow along with:
Resource 1: Writing items in Batch Example
Resource 2: AWS Javascript SDK v3 Documentation
Update: BatchWrite PutRequest work with the code below, so I know that the structure of my keys/attributes is closer to being correct. Still does not work for DeleteRequest.
export const params = {
RequestItems: {
"td_notes_sdk": [
{
PutRequest: {
Item: {
user_id: { "S": "bb" },
timestamp: { "N": "5" },
},
},
},
],
},
};

Answer 1

You don't supply an Item when deleting an item. You supply a Key.
Here is a working example:
const params_delete = {
RequestItems: {
"td_notes_sdk": [
{
DeleteRequest: {
Key: {
user_id: { S: "bb" },
timestamp: { N: "2" },
},
},
},
],
},
};
const delete_batch = async () => {
const ddbClient = new DynamoDBClient({ region: "us-east-2" });
try {
const data = await ddbClient.send(new BatchWriteItemCommand(params_delete));
console.log("Success, item deleted");
return data;
} catch (err) {
console.log("Error", err);
}
};
delete_batch();